USGS Geophysical Investigations Map Publications

These icons indicate the available components of each publication:

= Report

= CD/DVD

= Maps

= Geospatial Data

= Outside Link

= Interactive

Maps on topographic or planimetric bases; various scales; show results of surveys using geophysical techniques, such as gravity, magnetic, seismic, or radioactivity, which reflect subsurface structures that are of economic or geologic significance. Many maps are correlated with the geology.